WO2012001864A1 - Process for production of display device - Google Patents
Process for production of display device Download PDFInfo
- Publication number
- WO2012001864A1 WO2012001864A1 PCT/JP2011/002682 JP2011002682W WO2012001864A1 WO 2012001864 A1 WO2012001864 A1 WO 2012001864A1 JP 2011002682 W JP2011002682 W JP 2011002682W WO 2012001864 A1 WO2012001864 A1 WO 2012001864A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adhesive material
- substrate
- display device
- touch panel
- substrate member
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/10—Removing layers, or parts of layers, mechanically or chemically
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/50—Additional features of adhesives in the form of films or foils characterized by process specific features
- C09J2301/502—Additional features of adhesives in the form of films or foils characterized by process specific features process for debonding adherents
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133331—Cover glasses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face
- Y10T156/1153—Temperature change for delamination [e.g., heating during delaminating, etc.]
Definitions
- the present invention relates to a method for manufacturing a display device.
- a liquid crystal display device that performs transmissive display includes a liquid crystal display panel and a backlight unit that is disposed on the opposite side of the viewer of the liquid crystal display panel. A desired image is displayed by selectively transmitting the illumination light emitted from the backlight unit through the liquid crystal display panel.
- Patent Document 1 discloses an optical sheet provided in a backlight unit.
- the optical sheet includes a light diffusing member that diffuses and emits light, an optical functional member that controls characteristics such as a light emitting direction and luminance distribution, and an adhesive layer that joins the light diffusing member and the optical functional member. It has.
- An air layer is provided between the light diffusing member and the optical function member, and light transmitted through the air layer becomes illumination light supplied to the liquid crystal display panel.
- the pressure-sensitive adhesive layer is configured such that fine particles for flow prevention are dispersed in the pressure-sensitive adhesive composition, and the glass transition point Tg is larger than ⁇ 70 ° C. and lower than 0 ° C. Accordingly, it is described that the light diffusing member and the optical functional member are not lifted and peeled off, and the light diffusing member and the optical functional member can be joined to each other while holding the air layer.
- a touch panel or a parallax barrier panel is attached to the surface on the viewer side of the liquid crystal display panel (see Patent Documents 2 and 3, etc.).
- the touch panel and the parallax barrier panel are attached to the display panel via an adhesive material.
- a protective substrate or the like for protecting the touch panel or the like on the surface of the touch panel or the like. That is, a touch panel or the like is attached to one surface of the display panel via the first adhesive material, and a protective substrate or the like is provided to the surface opposite to the display panel such as the touch panel via the second adhesive material. It is pasted.
- first, the display panel and the touch panel are bonded together via the first adhesive material, and then the protective substrate and the like are bonded to the surface of the touch panel or the like via the second adhesive material.
- second procedure first, after the touch panel and the protective substrate are bonded to each other via the second adhesive material, the display panel is bonded to the surface of the touch panel and the like via the first adhesive material.
- the thickness of the display panel, the touch panel, etc. and each adhesive material is very thin, it is difficult to peel off only a desired substrate or panel, and it is difficult to perform rework appropriately.
- the present invention has been made in view of such a point, and an object of the present invention is to easily peel off a predetermined substrate or the like from another substrate or the like to enable appropriate rework. .
- a method of manufacturing a display device includes a first step of bonding a display panel and a first substrate member through a first adhesive material, and a step performed after the first step. And a second step of bonding the first substrate member and the second substrate member via a second adhesive material on the opposite side of the first substrate member from the display panel.
- an adhesive material having a glass transition point higher than the glass transition point of the first adhesive material is used as the second adhesive material.
- a method for manufacturing a display device is performed after the first step of bonding the first substrate member and the second substrate member through the first adhesive material, and after the first step, A method of manufacturing a display device, comprising: a second step of bonding the first substrate member and the display panel to each other on the opposite side of the first substrate member with the second adhesive material, In the second step, an adhesive material having a glass transition point higher than that of the first adhesive material is used as the second adhesive material.
- the glass transition point of the second adhesive material when the second bonding is performed is set to the first time. It was made larger than the glass transition point of the 1st adhesive material at the time of bonding. Therefore, when the first bonding is successful but a defect occurs in the second bonding, the temperature of the first and second adhesive materials is controlled to the temperature between the glass transition points. Thus, since only the second adhesive material can be cured among the first and second adhesive materials, the second substrate member or the display panel bonded together for the second time can be easily peeled off from the first substrate member. it can. As a result, the second substrate member or the display panel can be bonded again to the first substrate member and reworked appropriately.
- FIG. 1 is a cross-sectional view showing a main configuration of the liquid crystal display device according to the first embodiment.
- FIG. 2 is a cross-sectional view showing a liquid crystal display panel and a touch panel bonded to each other, and a protective substrate.
- FIG. 3 is a cross-sectional view showing the liquid crystal display device accommodated in the cooling chamber.
- FIG. 4 is a cross-sectional view showing a cooled liquid crystal display device.
- FIG. 5 is a cross-sectional view showing the protective substrate peeled off from the touch panel.
- FIG. 6 is a cross-sectional view showing a main configuration of the liquid crystal display device according to the second embodiment.
- FIG. 7 is a cross-sectional view showing a protective substrate and a touch panel bonded to each other, and a liquid crystal display panel.
- Embodiment 1 of the Invention 1 to 5 show Embodiment 1 of the present invention.
- FIG. 1 is a cross-sectional view showing the main configuration of the liquid crystal display device 1 according to the first embodiment.
- FIG. 2 is a cross-sectional view showing the liquid crystal display panel 10 and the touch panel 11 and the protective substrate 12 bonded to each other.
- FIG. 3 is a cross-sectional view showing the liquid crystal display device 1 accommodated in the cooling chamber 15.
- FIG. 4 is a cross-sectional view showing the cooled liquid crystal display device 1.
- FIG. 5 is a cross-sectional view showing the protective substrate 12 peeled off from the touch panel 11.
- the liquid crystal display device 1 will be described as an example of a display device.
- the liquid crystal display device 1 includes a liquid crystal display panel 10, a touch panel 11 that is a first substrate member disposed to face the liquid crystal display panel 10, and a second substrate member disposed to face the touch panel 11. And a protective substrate 12.
- the liquid crystal display panel 10 and the touch panel 11 are bonded together via a first adhesive material 21.
- the touch panel 11 and the protective substrate 12 are bonded together via the second adhesive material 22.
- liquid crystal display panel 10 Although the detailed illustration of the liquid crystal display panel 10 is omitted, a TFT substrate (not shown) as an active matrix substrate, a counter substrate (not shown) arranged to face the TFT substrate, a TFT substrate, and a counter substrate And a liquid crystal layer (not shown) provided therebetween.
- the liquid crystal display panel 10 has a display area (not shown) and a frame-like non-display area (not shown) provided around the display area. In the display area, a plurality of pixels (not shown) arranged in a matrix are formed.
- the counter substrate has a transparent substrate (not shown) such as a glass substrate on which a color filter and a common electrode are formed.
- the TFT substrate is a transparent substrate (not shown) such as a glass substrate on which a plurality of source wirings (not shown) extending in parallel with each other and a plurality of gate wirings (not shown) extending perpendicular to these are formed.
- a pixel electrode and a TFT (Thin-Film Transistor) connected to the pixel electrode are formed for each pixel.
- the liquid crystal display panel 10 is configured to perform a desired display by applying a predetermined voltage between the pixel electrode and the common electrode for each pixel.
- the touch panel 11 is, for example, a resistive film type touch panel, and includes a first transparent substrate (not shown) and a second transparent substrate (not shown) arranged to face the first transparent substrate.
- the touch panel 11 includes a frame-like frame region (not shown) formed at the peripheral portions of the first transparent substrate and the second transparent substrate, and a detection region (not shown) formed inside the frame region for detecting the touch position. (Not shown).
- the second transparent substrate is a touch operation side substrate, and is configured by a flexible resin substrate.
- the material of the resin substrate include resins such as PET (Polyethylene Terephthalate).
- the first transparent substrate is formed of, for example, a glass substrate.
- the first transparent substrate and the second transparent substrate are bonded to each other with an adhesive layer (not shown) in a state where a predetermined interval is provided.
- a transparent electrode (not shown) such as ITO is uniformly formed over the entire detection region on the surface of the first transparent substrate on the second transparent substrate side.
- a transparent electrode such as ITO is uniformly formed over the entire detection region on the surface of the second transparent substrate on the first transparent substrate side.
- a plurality of dot spacers are formed on the surface of the transparent electrode in the first transparent substrate.
- the dot spacers are made of, for example, an insulating epoxy resin, and are formed with a minute dimension smaller than the interval between the substrates in the detection region, and are arranged at a predetermined pitch.
- a potential gradient is formed on the transparent electrode of the second transparent substrate by the resistance of ITO. Then, when the detection area of the second transparent substrate is touched and curved toward the first transparent substrate, the transparent electrode of the second transparent substrate comes into contact with the transparent electrode of the first transparent substrate. At this time, the potential at the contact point is detected through the transparent electrode on the first transparent substrate side. Thus, the touch position is detected.
- the protective substrate 12 is a transparent substrate for protecting the touch panel 11, and is formed of, for example, a glass substrate or a transparent resin substrate.
- the first adhesive material 21 interposed between the touch panel 11 and the liquid crystal display panel 10 is made of a resin material such as an acrylate copolymer resin.
- the glass transition point Tg (1) of the first adhesive material 21 is, for example, ⁇ 27 ° C.
- glass transition refers to a phenomenon that changes from a glassy hard state to a rubbery state when a polymer substance is heated.
- the glass transition point (Tg) refers to the temperature at which the glass transition occurs.
- Glass transition point (Tg) can be measured by DSC method.
- the DSC method is a method for quantifying a thermal change that occurs when a sample is raised and lowered at a constant speed as a heat energy amount, and is called a differential scanning calorimetry (Differential Scanning Calorimetry) method.
- the second adhesive material 22 interposed between the touch panel 11 and the protective substrate 12 is made of a resin material such as an acrylate copolymer resin, for example, like the first adhesive material 21.
- the glass transition point Tg (2) of the second adhesive material 22 is lower than the glass transition point Tg (1) of the first adhesive material 21 and is, for example, ⁇ 54 ° C.
- the liquid crystal display device 1 is manufactured by bonding the liquid crystal display panel 10, the touch panel 11, and the protective substrate 12 formed in advance through the first adhesive material 21 or the second adhesive material 22, respectively.
- the liquid crystal display panel 10 and the touch panel 11 are bonded together via the first adhesive material 21.
- This first step is performed at the first work place. If, at this stage, a foreign matter is mixed between the liquid crystal display panel 10 and the touch panel 11 or a positional error occurs during bonding, the first adhesive material 21 is made of the glass. The first adhesive material 21 is cured by cooling to a temperature lower than the transition point Tg (1). Thereafter, the touch panel 11 is peeled off from the liquid crystal display panel 10 to perform rework, and the new touch panel 11 is attached to the liquid crystal display panel 10 again through the new first adhesive material 21.
- the touch panel 11 and the protective substrate 12 are bonded together via the second adhesive material 22 on the side opposite to the liquid crystal display panel 10 of the touch panel 11.
- the second step is performed at a second work place that is separated from the first work place.
- an adhesive material having a glass transition point Tg (2) higher than the glass transition point Tg (1) of the first adhesive material 21 is used as the second adhesive material 22.
- the third step is performed.
- the laminated body of the liquid crystal display panel 10, the touch panel 11 and the protective substrate 12 is accommodated in the cooling chamber 15, and the laminated body is cooled.
- the cooling chamber 15 is provided with a temperature sensor 16.
- the temperature of the cooling chamber 15 is controlled by the temperature control unit 17 to a predetermined temperature based on the temperature detected by the temperature sensor 16.
- the first adhesive material 21 and the second adhesive material 22 are made larger than the glass transition point Tg (1) of the first adhesive material 21 and less than the glass transition point Tg (2) of the second adhesive material 22. Cool to temperature.
- the first adhesive material 21 is uncured, while the second adhesive material 22 is cured.
- the protective substrate 12 is peeled off from the touch panel 11 after the third step.
- the first adhesive material 21 is in an uncured state, while the second adhesive material 22 is in a cured state. Therefore, by using the wedge-shaped peeling jig 19, the second adhesive material 22 and the touch panel 11 are separated.
- the second adhesive material 22 and the protective substrate 12 can be easily peeled off from the touch panel 11 at the interface.
- the second step is performed again, and a new protective substrate 12 is bonded to the touch panel 11 via a new second adhesive material 22.
- a new protective substrate 12 is bonded to the touch panel 11 via a new second adhesive material 22.
- the touch panel 11 and the protective substrate 12 are bonded to the second time to manufacture the liquid crystal display device 1. Since the glass transition point Tg (2) of the second adhesive material 22 for the second bonding is made larger than the glass transition point Tg (1) of the first adhesive material 21 for the first bonding, the first time When the bonding (first step) is successful, but a bonding failure occurs in the second bonding (second step), the temperature of the first adhesive material 21 and the second adhesive material 22 is set. By controlling the temperature between the glass transition points Tg (1) and Tg (2), only the second adhesive material 22 among the first adhesive material 21 and the second adhesive material 22 can be cured. Therefore, the protective substrate 12 bonded to the second time can be easily peeled off from the touch panel 11. As a result, the protective substrate 12 can be bonded to the touch panel 11 and reworked appropriately.
- Embodiment 2 of the Invention >> 6 and 7 show Embodiment 2 of the present invention.
- FIG. 6 is a cross-sectional view showing the main configuration of the liquid crystal display device 1 according to the second embodiment.
- FIG. 7 is a cross-sectional view showing the protective substrate 12 and the touch panel 11 and the liquid crystal display panel 20 bonded together.
- the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the first adhesive material 21 is interposed between the liquid crystal display panel 10 and the touch panel 11, while the second adhesive material 22 is interposed between the touch panel 11 and the protective substrate 12.
- the second adhesive material 22 is interposed between the liquid crystal display panel 10 and the touch panel 11, while the first adhesive material is interposed between the touch panel 11 and the protective substrate 12.
- An adhesive material 21 was interposed.
- the touch panel 11 and the protective substrate 12 are bonded together via the 1st adhesive material 21 in a 1st process.
- the first step is performed at the first work place. If, at this stage, a foreign matter is mixed between the touch panel 11 and the protective substrate 12 or a positional error occurs during bonding, the first adhesive material 21 is transferred to the glass transition.
- the first adhesive material 21 is cured by cooling to a temperature lower than the point Tg (1). Thereafter, the protective substrate 12 is peeled off from the touch panel 11 to perform rework, and a new protective substrate 12 is attached to the touch panel 11 again through the new first adhesive material 21.
- the touch panel 11 and the liquid crystal display panel 10 are bonded together via the second adhesive material 22 on the side opposite to the protective substrate 12 of the touch panel 11.
- the second step is performed at a second work place that is separated from the first work place.
- an adhesive material having a glass transition point Tg (2) higher than the glass transition point Tg (1) of the first adhesive material 21 is used as the second adhesive material 22.
- the laminated body of the liquid crystal display panel 10, the touch panel 11 and the protective substrate 12 is accommodated in the cooling chamber 15, and the laminated body is cooled.
- the first adhesive material 21 and the second adhesive material 22 are made larger than the glass transition point Tg (1) of the first adhesive material 21 and less than the glass transition point Tg (2) of the second adhesive material 22. Cool to temperature. As a result, the first adhesive material 21 is uncured, while the second adhesive material 22 is cured.
- the liquid crystal display panel 10 is peeled off from the touch panel 11.
- the first adhesive material 21 is in an uncured state
- the second adhesive material 22 is in a cured state. Therefore, by using the wedge-shaped peeling jig 19, the second adhesive material 22 and the liquid crystal display panel 10 are used.
- the second adhesive material 22, the touch panel 11, the first adhesive material 21, and the protective substrate 12 can be easily peeled off from the liquid crystal display panel 10.
- the first step and the second step are performed again, and the touch panel 11 to which the protective substrate 12 is bonded via the first adhesive material 21 is bonded to the liquid crystal display panel 10 via the second adhesive material 22.
- the first step and the second step are performed again, and the touch panel 11 to which the protective substrate 12 is bonded via the first adhesive material 21 is bonded to the liquid crystal display panel 10 via the second adhesive material 22.
- the second embodiment when the liquid crystal display device 1 is manufactured by bonding the touch panel 11 and the liquid crystal display panel 10 to the second time after bonding the touch panel 11 and the protective substrate 12 to the first time, Since the glass transition point Tg (2) of the second adhesive material 22 for the second bonding is made larger than the glass transition point Tg (1) of the first adhesive material 21 for the first bonding, the first time When the bonding (first step) is successful, but a bonding failure occurs in the second bonding (second step), the temperature of the first adhesive material 21 and the second adhesive material 22 is set. By controlling the temperature between the glass transition points Tg (1) and Tg (2), only the second adhesive material 22 among the first adhesive material 21 and the second adhesive material 22 can be cured. Therefore, the liquid crystal display panel 10 bonded for the second time can be easily peeled off from the touch panel 11. As a result, the touch panel 11 can be bonded to the liquid crystal display panel 10 and reworked appropriately.
- the touch panel 11 is described as an example of the first substrate member
- the protective substrate 12 is described as an example of the second substrate member.
- the present invention is not limited thereto.
- Other optical members can be applied to the first substrate member and the second substrate member.
- the parallax barrier panel separates the first image and the second image displayed on the display panel so that the first image is viewed in the first viewing area while the second image is viewed in the second viewing area.
- a panel having an engineering function is a panel having an engineering function.
- the liquid crystal display panel 10 has been described as an example of the display panel.
- the present invention is not limited thereto, and the present invention is similarly applied to other display panels such as an organic EL display panel. be able to.
- the present invention is useful for a method for manufacturing a display device.
- Liquid crystal display device 10 Liquid crystal display panel 11 Touch panel (first board member) 12 Protection board (second board member) 17 Temperature controller 19 Peeling jig 20 LCD panel 21 First adhesive 22 Second adhesive material
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
- Position Input By Displaying (AREA)
Abstract
Description
図1~図5は、本発明の実施形態1を示している。
1 to 5
次に、上記液晶表示装置1の製造方法について説明する。 -Production method-
Next, a method for manufacturing the liquid
したがって、この実施形態1によると、1回目にタッチパネル11と液晶表示パネル10とを貼り合わせた後に、2回目にタッチパネル11と保護基板12とを貼り合わせて液晶表示装置1を製造する場合において、2回目に貼り合わせる際の第2粘着材22のガラス転移点Tg(2)を、1回目に貼り合わせる際の第1粘着材21のガラス転移点Tg(1)よりも大きくしたので、1回目の貼り合わせ(第1工程)が成功したものの2回目の貼り合わせ(第2工程)で貼り合わせ不良が生じてしまったようなときに、第1粘着材21及び第2粘着材22の温度を上記各ガラス転移点Tg(1),Tg(2)の間の温度に制御することにより、第1粘着材21及び第2粘着材22のうち第2粘着材22のみを硬化させることができる。そのため、2回目に貼り合わせた保護基板12をタッチパネル11から容易に引き剥がすことができる。その結果、保護基板12をタッチパネル11に貼り合わせ直して、適切にリワークすることができる。 -Effect of Embodiment 1-
Therefore, according to the first embodiment, after the
図6及び図7は、本発明の実施形態2を示している。 << Embodiment 2 of the Invention >>
6 and 7 show Embodiment 2 of the present invention.
したがって、この実施形態2によると、1回目にタッチパネル11と保護基板12とを貼り合わせた後に、2回目にタッチパネル11と液晶表示パネル10とを貼り合わせて液晶表示装置1を製造する場合において、2回目に貼り合わせる際の第2粘着材22のガラス転移点Tg(2)を、1回目に貼り合わせる際の第1粘着材21のガラス転移点Tg(1)よりも大きくしたので、1回目の貼り合わせ(第1工程)が成功したものの2回目の貼り合わせ(第2工程)で貼り合わせ不良が生じてしまったようなときに、第1粘着材21及び第2粘着材22の温度を上記各ガラス転移点Tg(1),Tg(2)の間の温度に制御することにより、第1粘着材21及び第2粘着材22のうち第2粘着材22のみを硬化させることができる。そのため、2回目に貼り合わせた液晶表示パネル10をタッチパネル11から容易に引き剥がすことができる。その結果、タッチパネル11を液晶表示パネル10に貼り合わせ直して、適切にリワークすることができる。 -Effect of Embodiment 2-
Therefore, according to the second embodiment, when the liquid
上記実施形態1及び2では、第1基板部材としてタッチパネル11を、また第2基板部材として保護基板12を例に挙げて説明したが、本発明はこれに限らない。第1基板部材及び第2基板部材は、他の光学部材を適用することが可能である。例えば、タッチパネル11の代わりに第1基板部材として視差バリアパネルを適用することが可能である。 << Other Embodiments >>
In the first and second embodiments, the
10 液晶表示パネル
11 タッチパネル(第1基板部材)
12 保護基板(第2基板部材)
17 温度制御部
19 剥離用治具
20 液晶表示パネル
21 第1粘着材
22 第2粘着材 1 Liquid crystal display device
10 Liquid crystal display panel
11 Touch panel (first board member)
12 Protection board (second board member)
17 Temperature controller
19 Peeling jig
20 LCD panel
21 First adhesive
22 Second adhesive material
Claims (7)
- 表示パネルと第1基板部材とを第1粘着材を介して貼り合わせる第1工程と、
上記第1工程の後に行われ、上記第1基板部材の上記表示パネルと反対側において、該第1基板部材と第2基板部材とを第2粘着材を介して貼り合わせる第2工程とを有する表示装置の製造方法であって、
上記第2工程では、上記第2粘着材として、上記第1粘着材のガラス転移点よりも高いガラス転移点を有する粘着材を用いる
ことを特徴とする表示装置の製造方法。 A first step of bonding the display panel and the first substrate member through the first adhesive material;
A second step which is performed after the first step, and which bonds the first substrate member and the second substrate member through a second adhesive material on the opposite side of the first substrate member from the display panel. A method for manufacturing a display device, comprising:
In the second step, an adhesive material having a glass transition point higher than the glass transition point of the first adhesive material is used as the second adhesive material. - 請求項1に記載された表示装置の製造方法において、
上記第2工程において上記第1基板部材と上記第2基板部材との貼り合わせ不良が生じた場合に行われ、上記第1粘着材及び第2粘着材を、該第1粘着材のガラス転移点よりも大きく且つ上記第2粘着材のガラス転移点未満の温度に冷却する第3工程と、
上記第3工程の後で上記第2基板部材を上記第1基板部材から引き剥がす第4工程とを有し、
上記第4工程の後に、上記第2工程を再度行う
ことを特徴とする表示装置の製造方法。 In the manufacturing method of the display device according to claim 1,
It is carried out when a bonding failure occurs between the first substrate member and the second substrate member in the second step, and the first adhesive material and the second adhesive material are changed to the glass transition point of the first adhesive material. A third step of cooling to a temperature greater than and below the glass transition point of the second adhesive material;
A fourth step of peeling the second substrate member from the first substrate member after the third step;
A method for manufacturing a display device, wherein the second step is performed again after the fourth step. - 第1基板部材と第2基板部材とを第1粘着材を介して貼り合わせる第1工程と、
上記第1工程の後に行われ、上記第1基板部材の上記第2基板部材と反対側において、該第1基板部材と表示パネルとを第2粘着材を介して貼り付合わせる第2工程とを有する表示装置の製造方法であって、
上記第2工程では、上記第2粘着材として、上記第1粘着材のガラス転移点よりも高いガラス転移点を有する粘着材を用いる
ことを特徴とする表示装置の製造方法。 A first step of bonding the first substrate member and the second substrate member through the first adhesive material;
A second step that is performed after the first step, and on the opposite side of the first substrate member from the second substrate member, the first substrate member and the display panel are bonded together via a second adhesive material. A display device manufacturing method comprising:
In the second step, an adhesive material having a glass transition point higher than the glass transition point of the first adhesive material is used as the second adhesive material. - 請求項3に記載された表示装置の製造方法において、
上記第2工程において上記第1基板部材と上記表示パネルとの貼り合わせ不良が生じた場合に行われ、上記第1粘着材及び第2粘着材を、該第1粘着材のガラス転移点よりも大きく且つ上記第2粘着材のガラス転移点未満の温度に冷却する第3工程と、
上記第3工程の後で上記表示パネルを上記第1基板部材から引き剥がす第4工程とを有し、
上記第4工程の後に、上記第2工程を再度行う
ことを特徴とする表示装置の製造方法。 In the manufacturing method of the display device according to claim 3,
It is performed when a bonding failure occurs between the first substrate member and the display panel in the second step, and the first adhesive material and the second adhesive material are made to be more than the glass transition point of the first adhesive material. A third step of cooling to a temperature that is larger and less than the glass transition point of the second adhesive material;
A fourth step of peeling the display panel from the first substrate member after the third step;
A method for manufacturing a display device, wherein the second step is performed again after the fourth step. - 請求項1乃至4の何れか1つに記載された表示装置の製造方法において、
上記第1基板部材は、タッチパネル又は視差バリアパネルである
ことを特徴とする表示装置の製造方法。 In the manufacturing method of the display device according to any one of claims 1 to 4,
The method for manufacturing a display device, wherein the first substrate member is a touch panel or a parallax barrier panel. - 請求項1乃至5の何れか1つに記載された表示装置の製造方法において、
上記第2基板部材は、保護基板である
ことを特徴とする表示装置の製造方法。 In the manufacturing method of the display device according to any one of claims 1 to 5,
The method for manufacturing a display device, wherein the second substrate member is a protective substrate. - 請求項1乃至6の何れか1つに記載された表示装置の製造方法において、
上記表示パネルは、液晶表示パネルである
ことを特徴とする表示装置の製造方法。 In the manufacturing method of the display device according to any one of claims 1 to 6,
The method for manufacturing a display device, wherein the display panel is a liquid crystal display panel.
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CN201180018423.0A CN102844802B (en) | 2010-06-28 | 2011-05-13 | Process for production of display device |
JP2012522432A JP5347068B2 (en) | 2010-06-28 | 2011-05-13 | Manufacturing method of display device |
US13/640,350 US8741089B2 (en) | 2010-06-28 | 2011-05-13 | Method for fabricating display device |
EP11800341.7A EP2546822B1 (en) | 2010-06-28 | 2011-05-13 | Process for production of display device |
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US (1) | US8741089B2 (en) |
EP (1) | EP2546822B1 (en) |
JP (1) | JP5347068B2 (en) |
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CN103073197A (en) * | 2012-12-18 | 2013-05-01 | 黄山市中显微电子有限公司 | Binding method of functional glass |
WO2013161868A1 (en) * | 2012-04-27 | 2013-10-31 | シャープ株式会社 | Display device equipped with touch panel |
US11097439B2 (en) * | 2012-10-17 | 2021-08-24 | Saxum, Llc | Method and apparatus for display screen shield replacement |
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JPWO2012001864A1 (en) | 2013-08-22 |
US20130068379A1 (en) | 2013-03-21 |
JP5347068B2 (en) | 2013-11-20 |
EP2546822A4 (en) | 2015-05-13 |
EP2546822B1 (en) | 2016-04-06 |
EP2546822A1 (en) | 2013-01-16 |
US8741089B2 (en) | 2014-06-03 |
CN102844802A (en) | 2012-12-26 |
CN102844802B (en) | 2014-10-15 |
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